Avoid storing a reference passed to SignatureChecker constructors

5 files changed, 8 insertions, 8 deletions

diff --git a/src/script/bitcoinconsensus.cpp b/src/script/bitcoinconsensus.cpp
index 5e1f473531..b0d5faaf77 100644
--- a/src/script/bitcoinconsensus.cpp
+++ b/src/script/bitcoinconsensus.cpp
@@ -78,7 +78,7 @@ int bitcoinconsensus_verify_script(const unsigned char *scriptPubKey, unsigned i
          // Regardless of the verification result, the tx did not error.
          set_error(err, bitcoinconsensus_ERR_OK);
 
-        return VerifyScript(tx.vin[nIn].scriptSig, CScript(scriptPubKey, scriptPubKey + scriptPubKeyLen), flags, TransactionSignatureChecker(tx, nIn), NULL);
+        return VerifyScript(tx.vin[nIn].scriptSig, CScript(scriptPubKey, scriptPubKey + scriptPubKeyLen), flags, TransactionSignatureChecker(&tx, nIn), NULL);
     } catch (const std::exception&) {
         return set_error(err, bitcoinconsensus_ERR_TX_DESERIALIZE); // Error deserializing
     }
diff --git a/src/script/interpreter.cpp b/src/script/interpreter.cpp
index b1cf028c54..af7c641c05 100644
--- a/src/script/interpreter.cpp
+++ b/src/script/interpreter.cpp
@@ -1076,7 +1076,7 @@ bool TransactionSignatureChecker::CheckSig(const vector<unsigned char>& vchSigIn
     int nHashType = vchSig.back();
     vchSig.pop_back();
 
-    uint256 sighash = SignatureHash(scriptCode, txTo, nIn, nHashType);
+    uint256 sighash = SignatureHash(scriptCode, *txTo, nIn, nHashType);
 
     if (!VerifySignature(vchSig, pubkey, sighash))
         return false;
diff --git a/src/script/interpreter.h b/src/script/interpreter.h
index 063a072368..fc64438f68 100644
--- a/src/script/interpreter.h
+++ b/src/script/interpreter.h
@@ -94,14 +94,14 @@ public:
 class TransactionSignatureChecker : public BaseSignatureChecker
 {
 private:
-    const CTransaction& txTo;
+    const CTransaction* txTo;
     unsigned int nIn;
 
 protected:
     virtual bool VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& vchPubKey, const uint256& sighash) const;
 
 public:
-    TransactionSignatureChecker(const CTransaction& txToIn, unsigned int nInIn) : txTo(txToIn), nIn(nInIn) {}
+    TransactionSignatureChecker(const CTransaction* txToIn, unsigned int nInIn) : txTo(txToIn), nIn(nInIn) {}
     bool CheckSig(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode) const;
 };
 
@@ -111,7 +111,7 @@ private:
     const CTransaction txTo;
 
 public:
-    MutableTransactionSignatureChecker(const CMutableTransaction& txToIn, unsigned int nInIn) : TransactionSignatureChecker(txTo, nInIn), txTo(txToIn) {}
+    MutableTransactionSignatureChecker(const CMutableTransaction* txToIn, unsigned int nInIn) : TransactionSignatureChecker(&txTo, nInIn), txTo(*txToIn) {}
 };
 
 bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, unsigned int flags, const BaseSignatureChecker& checker, ScriptError* error = NULL);
diff --git a/src/script/sigcache.h b/src/script/sigcache.h
index 6c5bba2c01..b299038daa 100644
--- a/src/script/sigcache.h
+++ b/src/script/sigcache.h
@@ -18,7 +18,7 @@ private:
     bool store;
 
 public:
-    CachingTransactionSignatureChecker(const CTransaction& txToIn, unsigned int nInIn, bool storeIn=true) : TransactionSignatureChecker(txToIn, nInIn), store(storeIn) {}
+    CachingTransactionSignatureChecker(const CTransaction* txToIn, unsigned int nInIn, bool storeIn=true) : TransactionSignatureChecker(txToIn, nInIn), store(storeIn) {}
 
     bool VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& vchPubKey, const uint256& sighash) const;
 };
diff --git a/src/script/sign.cpp b/src/script/sign.cpp
index d76466b703..14119f7e2c 100644
--- a/src/script/sign.cpp
+++ b/src/script/sign.cpp
@@ -123,7 +123,7 @@ bool SignSignature(const CKeyStore &keystore, const CScript& fromPubKey, CMutabl
     }
 
     // Test solution
-    return VerifyScript(txin.scriptSig, fromPubKey, STANDARD_SCRIPT_VERIFY_FLAGS, MutableTransactionSignatureChecker(txTo, nIn));
+    return VerifyScript(txin.scriptSig, fromPubKey, STANDARD_SCRIPT_VERIFY_FLAGS, MutableTransactionSignatureChecker(&txTo, nIn));
 }
 
 bool SignSignature(const CKeyStore &keystore, const CTransaction& txFrom, CMutableTransaction& txTo, unsigned int nIn, int nHashType)
@@ -174,7 +174,7 @@ static CScript CombineMultisig(const CScript& scriptPubKey, const CTransaction&
             if (sigs.count(pubkey))
                 continue; // Already got a sig for this pubkey
 
-            if (TransactionSignatureChecker(txTo, nIn).CheckSig(sig, pubkey, scriptPubKey))
+            if (TransactionSignatureChecker(&txTo, nIn).CheckSig(sig, pubkey, scriptPubKey))
             {
                 sigs[pubkey] = sig;
                 break;